83491071 has 16 divisors (see below), whose sum is σ = 113525760. Its totient is φ = 54568800.

The previous prime is 83491069. The next prime is 83491103. The reversal of 83491071 is 17019438.

It is not a de Polignac number, because 83491071 - 2¹ = 83491069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83491021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34621 + ... + 36953.

It is an arithmetic number, because the mean of its divisors is an integer number (7095360).

Almost surely, 2^83491071 is an apocalyptic number.

83491071 is a deficient number, since it is larger than the sum of its proper divisors (30034689).

83491071 is a wasteful number, since it uses less digits than its factorization.

83491071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2566.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 83491071 is about 9137.3448550441. The cubic root of 83491071 is about 437.0656517534.

The spelling of 83491071 in words is "eighty-three million, four hundred ninety-one thousand, seventy-one".